echoudp

Start or stop echo UDP server

Syntax

echoudp("on",port)

echoudp("off")

Description

echoudp("on",port) starts a UDP server at the specified port number.

echoudp("off") stops the echo server.

Examples

Communicate with an Echo UDP Server

This example shows how to set up an echo UDP server.

Start the echoserver using the echoudp function on port 4012. Create a udpport instance to communicate with the echo server.

echoudp("on",4012)
u = udpport

u = 
  UDPPort with properties:

     IPAddressVersion: "IPV4"
            LocalHost: "0.0.0.0"
            LocalPort: 58379
    NumBytesAvailable: 0

  Show all properties, functions

Write data using the write function to the echo server running on port 4012.

write(u,1:10,"uint8","127.0.0.1",4012);

The echo server sends back the data written to it. Read this data back using the read function.

data = read(u,10)

data = 1×10

     1     2     3     4     5     6     7     8     9    10

Stop the echo server and clear the udpport object.

echoudp("off")
clear u

Input Arguments

port — Port number of the server

numeric

Port number of the server, specified as a number between 1 and 65535, inclusive.

Data Types: double

Version History

Introduced before R2006a